Incinerating latrine or toilet apparatus



June 6, 1967 D. P. FRANKEL INCINERATING LATRINE OR TOILET APPARATUS Filed May 6,

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June 6, 1967 D. P. FRANKEL INCINERATING-LATRINE OR TOILET APPARATUS 4 Sheets-Sheet 2 Filed May 6, 1963 k .I\\ ll 1 I ll lllllllllll ll .June 6, 1967 I D. P. FRANKEL. 3,323,473

INCINBRATING LATHINE OR TOILET APPARATUS D. P. FRANKEL INCINERATING LATRINE OR TOILET APPARATUS June 6, 1967 4 Sheets-Sheet 4.

Filed May 6 1965 United States Patent 6 3,323,473 INCINERATIN G LATRINE OR TOILET APPARATUS Donald P. Frankel, Lake Geneva, Wis., assignor tq La Mere Industries, Inc., a corporation of Wisconsin Filed May 6, 1963, Ser. No. 278,015 21 Claims. (Cl. 110-9) This invention relates to dry latrines or closets and more particularly to dry latrines including incinerators for burning material deposited therein.

It is a general object of this invention to provide a new and improved dry latrine or closet.

It is another object of this invention to provide for cooling of a seat of a dry latrine or closet in a new and useful manner. 7

It is a further object of this invention to provide a new and useful dry latrine or closet wherein blackening of the underside of the closet seat is decreased or eliminated. Still another object of this invention is to provide for improved combustion in such a dry latrine or closet by means of a particular burner arrangement for use in the incinerating chamber of the latrine.

It is another object of this invention to provide new and useful motor and control means in a dry latrine or closet.

Yet another object of this invention is to provide a new and useful latrine or closet which is more conveniently and more safely usable.

An additional object of this invention is to provide for protection of an exhaust impeller or blower in a dry latrine to decrease or eliminate possible damage or clogging by debris forced or drawn from the closet bowl toward the exhaust blower.

Another additional object of this invention is to provide for protection of a burner in a dry latrine against flooding.

Other objects of this invention will be apparent to those in the art from the following descriptions and the drawings in which:

FIGURE 1 is a perspective view of an embodiment of a closet of this invention with the cover closed;

FIGURE 2 is a top view of the embodiment of FIG- URE 1 with the internal structure shown in dotted lines;

FIGURE 3 is a wiring diagram for control of the closet in accordance with one feature of this invention;

FIGURE 4 is a sectional view through the embodiment of FIGURE 1 generally along line 44 of FIGURE 2;

FIGURE 5 is a vertical section taken along line 5-5 of FIGURE 4;

FIGURE 6 is a partial vertical section along line 6-6 of FIGURE 5;

FIGURE 7 is a partial vertical section through another latrine or closet showing driving of a rotary comb means by a blower motor shaft; and

FIGURE 8 is a sectional view through a modification of the embodiment of FIGURE 1 generally along line 4-4 of FIGURE 2.

While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and will herein be described in detail a specific embodiment of the invention with modification thereof, with the understanding that the present disclosure is considered to be an exemplification of the principles of the invention and is not intended to limit the invention to the embodiment or modification illustrated.

Turning now to the drawings, as an example of one embodiment of the present invention and with reference to FIGURES 1-6, there is provided a latrine, indicated generally by reference numeral 10, which may be positioned, as illustrated in FIGURE 1, upon a floor 11 with the back of the latrine against a wall 12. The latrine (FIG- URE 2) is associable with exhaust duct work 13 within or through wall 12 and is also associable with a gas supply or feed line 14 within or through wall 12.

Latrine or closet 10 includes cover or closure means such as lid or cover 17 suitably mounted, e.g. by hinges 18, for movement between open and closed positions. Although the cover 17 is illustrated in the drawings in closed position, the open position will be obvious. Cover 17 is pivotally mounted by hinges 18 on top casing wall 19 which is in turn supported by side casing walls 20, front casing wall 21 and back casing wall 22. Casing wall 22 is flush against wall 12. A seat member 23 having a central opening is provided in the usual manner and is mounted on top wall 19 between the top wall and cover 17 with cover 17 in closed position. Cover 17 may be conveniently lifted when desired for access to seat 23 and for use of the latrine.

Disposed within latrine 10 and mounted therein by suitable means is a means for mixing and pressurizing air and gas for use as fuel in the latrine burner 31. Accordingly, a pressurizer or blower 24 is disposed to receive fuel gas from gas inlet conduit 27 connected to gas line supply 14. A solenoid valve 28 is provided in line 27 for controlling flow of gas through line 27 responsive to control means to be described hereinbelow. Solenoid valve 28 is a normally closed valve adapted to open by electrical energization of the solenoid.

Pressurizer 24 receives air from within latrine 10 through intake means such as the air intake opening 29 provided in the top central portion of the housing of blower of pressurizer 24. Pressurizer or blower 24 may be of conventional design and construction, such as an impeller type gas-air mixer and pressurizer. Pressurizer 24 discharges the pressurized gas-air mixture through suitable conduit means, such as air-gas feed line 30, to burner means as provided by burner nozzle 31. The pressurizer, gas inlet means, and its control or valve means, the air intake means, the air-gas conduit means and the burner nozzles are all parts of the burner system of the illustrated embodiment. Also, in the burner system there is provided ignition means for the burner such as spark plug or igniter 32. Spark plug igniter 32, referring to FIGURE 3, is provided with a conventional heat responsive control device in the form of a bi-metallic strip 34 which is disposed adjacent the flame position of burner nozzle 31 to receive heat from the burner when ignited. Thus, upon ignition of the burner, the igniter is automatically de-energized, its functioning no longer being necessary.

The bowl or receptacle 40 within latrine 10 is defined generally by a fire box or pot 37 at its lower end and generally upstanding sheet metal walls 38 thereabove. The central opening in seat 23 defines the inlet to bowl 40. The fire box portion 37 of receptacle 40 is defined by fire box walls 35, supported as at 36. Suitable insulation 39 is provided as desired or deemed necessary surrounding walls 35 and 38.

Excreta receiving and rendering means are disposed within fire box 37 for receiving excreta and breaking the excreta into small particles for more effective and efiicient burning of the excreta by the burner system. Accordingly, a stationary comb member 41 having flexible teeth or fingers 42 is secured to a side wall 38 of receptacle or bowl 40 and is angularly disposed within fire box 37. A rotary comb including a driven shaft 43 carrying a plurality of radial teeth 44 secured thereto is rotatably mounted within fire box 37 in association with comb member 41 with fingers 42 disposed between and spaced from teeth 44. Upon rotation of shaft 43 it will be seen that radial teeth 44 pass between fingers 42 of comb 41, spaced therefrom. Excreta deposited upon comb 41 and/or teeth 44 will be particlized by rotation of radial teeth 44 through comb 41. Teeth 44 are advantageously scooped in the direction of rotation of shaft 43 to provide for return of material from the bottom of fire box 37 to stationary comb fingers 42 for further particlization and more effective burning.

Shaft 43 is rotatably mounted at one end thereof in wall 35, as indicated at 47. Shaft 43 may be simply journaled within a bore provided in wall 35. The other end of shaft 43 is journaled through wall 35 at 47, and on the outer side of wall 35 is coupled to motor 48 by means of coupling 49. It is apparent that mountings 46 and 47 are watertight; these mountings may be sealed by any suitable means such as by close-fitting of shaft 43 therein.

Motor 48 is a one or two rpm gear motor, e.g. Dayton No. 4K807. Motor 48 is mounted outside of receptacle 40 and fire box 37 by suitable means (not shown). The flexibility of fingers 42 is suflicient so that the fingers will bend to prevent any jamming of the teeth 44 against comb 41 which may be sufficient to overload motor 48.

Exhaust means including an exhaust blower 50 having an intake 51 and an outlet 52 is provided for exhausting combustion gases and the like from receptacle 40 and fire box 37. The intake 51 is disposed in communication with fire box 37 for receiving combustion gases therefrom and the exhaust outlet 52 is connected with suitable wall duct work such as is indicated at 13 in FIGURE 2. Exhaust blower 50 and pressurizer 24 are both driven by a common high .Speed electric motor 53 disposed therebetween, Pressurizer 24 is supported by motor 53 which is in turn supported by blower 50. Blower 50 is supported by suitable flanges 54 mounted on and extending from walls 38 and 35.

Turning now to FIGURE 3 of the drawings, a control system is provided including means for controlling the actuation of burner solenoid 28 and igniter 32 and means for controlling blower motor 53 selectively or responsive to timed intervals. Included Within the system is a timer mechanism of conventional design having terminals A, B and C. The timer in its expired time position breaks the circuit between contacts A and both B and C. Timer 57 is adapted to time either of two different intervals, the longer of which intervals includes the shorter. Upon setting the timer for a longer timed interval, e.g. 30 minutes, the circuitry is completed from A to both B and C and burner solenoid 28 and igniter 32 are both energized as is blower motor 53, to supply fuel to burner 31 and to ignite the fuel issuing from the burner nozzle. Upon ignition of the fuel, temperature responsive bi-metallic switch 34 de-energizes igniter 32, while the solenoid valve 28 remains open and the blower motor 53 remains energized. Upon expiration of the shorter period or interval of time, pre-determined by the timer 57 used, eg after expiration of 24 of the 30 minutes, the circuit from A to .B is broken and the circuit from A to C remains completed until expiration of the remainder of the total longer timed interval.

Upon breaking the circuit from A to B, it is apparent that the supply of gas to pressurizer 29 will be discontinued and the burner will become extinguished. For the remainder of the timed interval, blower motor 53 operates to pump air by means of pressurizer 29 through conduit 30 and nozzle 31 across fire box 37 where the air is drawn through blower inlet 51 and exhausted by blower 50. Upon expiration of the total period of time, blower motor 53- is de-energized and the air circulation ceases.

Also provided in the circuitry of FIGURE 3 is a safety seat switch 58 which is a normally open SPST switch. Closing of cover 17 results in closing of switch 58, switch 58 being disposed with a mechanical switch member adapted to be actuated by closing cover 17 to close switch 58. Switch 58 assures that cover 17 is in closed position before fuel gas can be supplied to the burner 31.

A normally closed switch 59 is provided operated by cover 12 so that switch 59 is in normally closed position with the cover open. -By means of switch 59, blower motor 53 may be operated independently of timer 57 by opening cover 17 to turn on the blower and closing the seat to turn it off. Thus, during use of the seat, blowers 29 and 50 are operating. Further, timer 57 is adapted to be set to a shorter interval e.g. a 6 minute interval for energizing only motor 53 for the shorter interval without energizing solenoid valve 28 or igniter 32. Such independent control of blower motor 53 may be used to exhaust fumes from receptacle 40 without incincrating action.

In use of the device, cover 17 is lifted and excreta is deposited through the inlet or opening in seat 23. The excreta is received by members 41, 42 and/or 44 in fire box 37. Seat 17 is lowered and timer 57 is set for a 24 minute interval. Switch 58 is now closed with the closing seat 17, burner 31 is ignited and the combustion gases are exhausted through outlet 52. Burner 31 is adapted and disposed to direct a burning flame generally across fire box 37 and away from cover 17 to prevent undue blackening of the bottom side of the cover, which may act as a back-rest with cover 17 in raised position.

A blower shield means such as exhaust blower shield 60 is disposed adjacent inlet 51 of blower 50 to shield the blower, e.g. the blades of the blower, against flying debris, e.g. toilet tissue and the like, of sufficient size to damage or clog blower 50 or any parts or passages thereof. An additional pair of shield members 61 is provided between the excreta receiving and rending means and the exhaust blower, defining a restricted flow path laterally and forward from shield 60 to further protect blower 50 from flying debris.

At least one of shield members 61 is a conduit or tube and functions as a standpipe or safety drain to prevent the fluid or liquid level within fi-re box 37 from rising suflicient to extinguish burner 31. The standpipe drains through conduit 62 which may be registered with suitable drain means in the floor. Standpipe 61 and conduit 62 also act as a cooling air inlet for drawing air into the enclosure.

Pressurizing blower 24 and nozzle 31 comprise a power blower which, with valve 28 closed to exclude gas, directs a jet of air on the excreta receiving or rending surface in the combustion pot to help disintegrate residue.

Seat cooling means for cooling the seat member 23 are also provided. Accordingly, plate member 67 is mounted by spacer 68 and screw or nail means 69 to the lower or inner side of cover 17 defining an air passage or chamber between plate member 67 and seat cover member 17. Also secured to the lower side of cover 17 is a generally oval annular porous member 70 which is air permeable and disposed around the central opening in seat 23. During operating of the device, as described above, pressurizer 24 draws air in through intake 29 from receptacle or bowl 40 for mixing with fuel gas. Thus, air is drawn from the exterior of latrine 10 between seat 23 and cover 17, through porous member 70 and thence downward into receptacle 40. The passage of air over and around the inner edge of seat 23 defining the opening therethrough tends to cool the seating surface of the seat. This is particularly important at the edges of the seat opening which would normally be subjected to radiant heating from fire box 37. Plate member 67 further acts as a shield against such radiant heat and the space between plate 67 and cover 17 receives some circulating air currents tending to cool plate member 67. Thus, an air passage or flow path is defined from the exterior of latrine 10 between the cover and seat and through the inlet to bowl 40 adjacent the inner edge of seat member 23 defining the inlet. It is apparent that this cooling effect is continued throughout the incinerating operation while the burner is in operation and also as long as blower or press'urizer 24 is in operation. Further, the cooling action may be selectively initiated by means of switch 59 by raising seat cover 17 as desired to energizedrive blower 24.

The inner walls 38 of the pot are in the form of a removable skirt which may be removed from the pot, e.g. in sections for cleaning as desired. Further, skirt 38 is constructed to receive a protective paper cone which may be positioned in the pot prior to use and which may be disintegrated from the pot after use.

Turning now to FIGURE 7, there is illustrated a modification of the embodiment of FIGURES 1-6 wherein a single motor 53 may be used to drive pressurizer 24, exhaust blower 50 and shaft 43. Accordingly, a speed reducing drive indicated generally at 76 is provided. The drive shaft of motor 53 is extended through blower 55 as shown at 77 and into a watertight housing of drive assembly 76, suitably journaled therethrough at 81. Drive shaft 77 carries a worm gear 79 at its lower end which engages a worm wheel 80 secured to shaft 43. Shaft 43 is journaled through housing 78 by suitable watertight means indicated at 82. It is evident that rotation of shaft 77 by motor 53 will drive shaft 43 at reduced speed through worm gear 79 and worm wheel 80, to effect rotation of the rotary comb member for tending or particlizing excreta within the fire box.

Turning now to FIGURE 8, in the modification illustrated therein, the same reference numerals are used for structures or features common to the apparatus as illustra-ted in FIGURE 4. It will be noted that the modification of FIGURE 8 does not include a rotor or comb and the excreta receiving means of the modification is the bottom wall 37a of fire box 37. Stand pipe 61 is located more directly under the outlet blower 50 than in the structure of FIGURE 4.

In the modification of FIGURE 8, there is included a circumferential flange 85 secured to the bottom of seat 23 and completely surrounding the central opening in the seat. The flange is configurated and disposed to direct air entering between cover 17 and seat 23 and between seat 23 and plate 67 in the direction shown by the arrows in FIGURE 8. Generally, flange 35'is an air baffle which functions to keep the seat edge cooler by partially shielding the seat edge and by directing greater amounts of air over the inner edge of the seat at the seat opening. The air, so directed, may form an eddy of cool air adjacent the seat edge; however, in any event, air bafllle 85 advantageously improves cooling of the inner edge of the seat.

Also shown in FIGURE 8 are perforations 86 in plate 67, which perforations are sufiicient to permit a small amount of air to pass therethrough, thereby improving the circulation of air between cover 17 and plate 67 to improve cooling of cover 17. Perforations 86 are preferably not of such size as to permit undue heating of the lower side of cover 17 by radiation from the fire pot.

It will also be noted with reference to FIGURE 8 that the rear wall 35 of fire box 37 is inclined rearwardly upward toward the exhaust blower in order to provide more streamline, generally clear, flow of air for exhausting from the fire box with less obstruction from the fire box configuration. Additionally, in view of the absence of the comb and rotor and in view of the rearward inclination of the rear fire box wall, the blower shield 60 preferably extends downward closer to wall 35 for stopping flying debris.

As indicated above, the cooling action in a preferred form of device in accordance herewith may be initiated by selecting the cooling position on the timer or by raising the seat cover to energize-the drive blower. In addition to causing cooling, the device effects air circulation and forced venting of odors which may otherwise permeate a room in which the device is installed. This is especially important in the illustrated form of device where deposit under some conditions is into a hot combustion section and where boiling vapors and odors from high temperature solids could enter the room, were it not for the provision of the air current down through the system during such deposit.

I claim:

1. In a closet, a bowl having an inlet, cover means for selectively opening and closing said inlet, and excreta receiving means in said bowl: heater means disposed in heating proximity to said receiving means and capable of burning excreta, exhaust blower means defining an outlet from said bowl for exhausting fumes in combustion products therefrom, a generally circumferential seat member at said bowl inlet and defining a flow path between said seat member and said cover means with said cover means in closed position, and means mounted on said cover means for diverting said flow path into cooling proximity with the front under portion of said seat member and communicating through said bowl With said exhaust outlet.

2. In a closet, a bowl having an inlet, cover means for selectively opening and closing said inlet, and excreta (receiving means in said bowl: heater means disposed in heating proximity to said receiving means and capable of burning excreta, exhaust blower means defining an outlet from said bowl for exhausting fumes and combustion products therefrom, a plate member, and means mounting said plate member on the cover in spaced relation thereto and on the inside thereof, said cover means and plate member defining an air passage therebetween in communication with air externally of said bowl.

3. In a latrine, a bowl having a fire pot, an inlet and an outlet, a generally circumferential seat member at said inlet and defining the passage therethrough, cover means pivotally mounted for selectively opening and closing said inlet, a rotary comb member including a shaft mounted for rotation in said fire pot and a plurality or radial teeth on said shaft, said rotary comb member being positioned in said fire pot to receive excreta from said inlet, a stationary comb mounted in said bowl having a linear plurality of teeth adapted and positioned to mesh with said radial teeth upon rotation of said rotary comb, means for rotating said rotary comb to rend any excreta on said rotary comb by intermeshing of said respective teeth, a burner nozzle in said bowl positioned to direct a flame across said fire pot and rotary comb member toward said outlet, and pressurizing means for charging a mixture of air and gas to said burner nozzle.

4. The latrine of claim 3 including standpipe means in said fire pot for draining fluid from said fire pot to a level below said burner nozzle.

5. The latrine of claim 3 including exhaust blower means at said outlet for exhausting combustion gases from said fire pot through said outlet.

6. The latrine of claim 5 including shield means in said fire pot for preventing the passage of solid materials of substantial size into said exhaust blower.

7. In a latrine, a bowl having an inlet and an outlet, a

. generally circumferential seat member at said inlet and defining the passage therethrough, cover means pivotally mounted for selective opening and closing of said inlet, a combustion chamber in said bowl, a burner nozzle in said bowl positioned to direct a flame into said combustion chamber, exhaust blower means for exhausting combustion gases from said bowl through said outlet, blower means for receiving separate streams of gas and air and for preparing, pressurizing and charging a mixture of air and gas to said burner nozzle, igniter means for igniting the gas-air mixture flowing from said nozzle, conduit means for charging gas feed to said pressurizing blower means, and valve means in said conduit for controlling the flow of gas to said blower means, said valve means including a valving member movable between open and closed positions for opening and closing the conduit.

8. The device of claim 7 wherein said pressurizing blower means comprises a rotary impeller blower having a housing and a conduit extending from the housing to the burner nozzle.

9. In a latrine, a bowl having an inlet and an outlet, a generally circumferential seat member at said inlet and defining a passage therethrough, cover means pivotally mounted for selective opening and closing of said inlet, a rotary comb member including a shaft mounted for rotation in said bowl and a plurality of radial teeth on said shaft, said rotary comb being positioned in said bowl to receive excreta from said inlet, a stationary comb mounted in said bowl having a linear plurality of teeth adapted and positioned to mesh with said radial teeth upon rotation of said rotary comb for rending any excreta on said rotary comb by intermeshing of said respective teeth, a burner nozzle in said bowl positioned to direct a flame across said rotary comb member, exhaust blower means for exhausting combustion gases from said bowl through said outlet, and motor means for driving said exhaust blower at a relatively high speed and for driving said rotary comb at substantially lower speed.

10. In -a latrine, a bowl having an inlet and an outlet, a generally circumferential seat member at said inlet and defining a passage therethrough, cover means pivotally mounted for selective opening and closing of said inlet, a rotary comb member including a shaft mounted for rotation in said bowl, and a plurality of radial teeth on said shaft, said rotary comb member being positioned in said bowl to receive excreta from said inlet, a stationary comb mounted in said bowl having a linear plurality of teeth adapted and positioned to mesh with said radial teeth upon rotation of said rotary comb, a burner nozzle in said bowl positioned to direct a flame across said rotary comb member, exhaust blower means for exhausting combustion gases from said bowl through said outlet, single pressurizing means for charging a fuel-air mixture to said burner nozzle, and single geared motor means for driving said pressurizing means and exhaust blower at relatively high speeds and for driving said rotary comb at substantially lower speed.

11. In a latrine, a bowl having an inlet and an outlet, a generally circumferential seat member at said inlet and defining the passage therethrough, cover means pivotally mounted for selective opening and closing of said inlet by pivoting away from and toward said seat member, a rotary comb member including a shaft mounted for rotation in said bowl and a plurality of rigid radial teeth on said shaft, said rotary comb member being positioned in said bowl with said radial teeth defining a grate adapted to receive excreta from said inlet, a stationary comb mounted in said bowl having a linear plurality of flexible teeth adapted and positioned to mesh with said radial teeth upon rotation of said rotary comb, motor means for rotating said rotary comb to rend any excreta on said rotary comb by intermeshing of said rigid and flexible teeth, said flexible teeth being sutficiently resilient to bend and return without breaking under jamming conditions of said intermeshing teeth of sufficient severity to otherwise stop said motor means, a heating means in said bowl adapted to cause burning of excreta on said rotary comb member, and exhaust blower means for exhausting combustion gases from said bowl through said outlet.

12. In a closet including a bowl having an inlet, cover means for selectively opening and closing the inlet, and excreta receiving means in said bowl: heater means disposed in heating proximity to said receiving means and capable of burning excreta, exhaust blower means defining an outlet from said bowl for exhausting fumes and combustion products therefrom, a generally circumferential seat member at said bowl inlet defining a flow path between the seat member and said cover means while said cover means is in closed position, and air bafi le means subjacent said inlet for directing air entering through said flow path into cooling proximity with the underside of the front portion of said seat member with said cover in closed position.

13. In a closet including a bowl having an inlet, cover means for selectively opening and closing said inlet, and excreta receiving means in said bowl: heater means,

means mounting said heater means in heating proximity to said receiving means for burning excreta thereon, exhaust blower means, an outlet from said bowl, means mounting said blower means for exhausting fumes and combustion products through said outlet, and a perforated shield member mounted on the closure side of said cover means in spaced relation thereto, said cover means and shield member defining an air passage therebetween in communication with air externally of said bowl and the perforations of said shield member permitting passage of small amounts of air through said shield member into said bowl.

14. In a dry latrine, a bowl having a fire pot and an inlet, cover means for selectively opening and closing said inlet, excreta receiving means in the fire pot adjacent the bottom of said bowl, burner nozzle means, means mounting said nozzle means in heating proximity to said receiving means, exhaust blower means, an outlet from said bowl, means mounting said blower means at said outlet for exhausting fumes and combustion products therefrom, said nozzle mounting means mounting said nozzle at an angle directing soot-depositing combustion gases directly to said blower means and away from contact with said cover means at said inlet with said cover means in closed position, a generally circumferential seat member at said bowl inlet defining a flow path between said seat member and said cover means with said cover means in closed position, said flow path passing in cooling proximity with the inner portion of said seat member and communicating through said bowl with said exhaust outlet, means defining a flow path from said receiving means to said exhaust blower, shield means disposed across said flow path for preventing passage of solid materials normally sufficient to obstruct said exhaust blower and inhibit the action thereof, means for pressurizing and charging a mixture of air and gas to said burner nozzle, conduit means for charging gas feed to said pressurizing means, valve means in said conduit for controlling the flow of gas to said pressurizing means, said valve means including a valving member movable between open and closed positions for opening and closing the conduit, a solenoid for moving saidvalving member to open position on energization of the solenoid and to closed position on deenergization of the solenoid, electric igniter means for igniting the gas and air mixture at the burner, single motor means for driving said pressurizing means and exhaust blower, electrical circuitry including timer means completing electrical circuitry to said igniter, said solenoid, and said motor means for a first timed interval and breaking electrical circuitry to said igniter and solenoid for a second timed interval, while maintaining the motor means energized, switch means in the circuitry of said second timed interval overriding control by said timer responsive to opening said cover and positioned to deenergize said burner solenoid valve at all times with said cover in open position, and switch means by-passing said timer means for selectively energizing said motor means regardless of energization through said timer.

15. In an incinerating device, a bowl having an inlet and an outlet, cover means for selectively opening and closing said inlet, and a waste receiving surface in said bowl: burner means disposed to direct a flame on said receiving surface for burning waste, first rotary blower means for delivering a fuelair mixture to said burner means, second rotary blower means mounted at said outlet for exhausting combustion gases from the bowl through said outlet, a common shaft mounting said first and second rotary blower means on a common axis of rotation, and motor means for driving said shaft, and thereby both of said blower means, at relatively high speeds.

16. In a closet, a bowl, a cool air inlet, a fire pot in said bowl having a surface for receiving waste to be burned, an outlet opening for receiving combustion gases from said fire pot, blower means for receiving cooling air from said inlet, and pressure burner means including an imperforate conduit having an air inlet and terminating in a burner nozzle mounted to direct air flowing therefrom against said surface for delivering gases to and through said nozzle to impinge on said surface, fuel supply means for supplying fuel for admixture with air in said conduit, selectively operable valve means for admitting or blocking the supply of fuel from said fuel supply means whereby said conduit can conduct air or a mixture of air .and fuel, pressurizing means for pressurizing the air or air and fuel mixture for flow through the conduit and through said nozzle, and means for igniting the fuel and air mixture leaving the nozzle.

17. The closet of claim 16 including timer means for establishing a timed heating cycle followed by a timed cooling cycle, and means responsive to said timer means for controlling said selectively operable valve means at the beginning of the heating cycle for admission of fuel to said pressure burner and for controlling said selectively operable valve means at the beginning of the heating cycle for admission of fuel to said pressure burner and for controlling said selectively operable valve means at the end of the heating cycle to shut off admission of fuel to said pressure burner means whereby only cooling air is circulated by said pressure burner means through said conduit and nozzle for directly impinging and cooling said surface during the cooling cycle.

18. The closet of claim 16 wherein said pressurizing means comprises blower means for charging air through said conduit and nozzle and including means controlling said valve means and blower means for closing said valve means responsive to expiration of a first timed interval while operating said blower to deliver cooling air through said conduit and nozzle and against said surface.

19. The closet of claim 16 wherein said fuel supplying means is mounted sufficiently upstream from the igniting means to permit intimate pressurized mixing of air and fuel by the pressurizing means in said conduit prior to passing said igniting means.

20. The closet of claim 16 wherein said nozzle, said surface and said outlet opening are in flow alignment from the front to the rear of said fire pot whereby gases passing from said nozzle and impinging said surface pass directly through said outlet.

21. The closet of claim 16 wherein said surface is backed by a thick, solid, insulated wall in the absence of heat exchange jacketing, and the sole cooling effect on said surface results directly from the impingement of air from the nozzle thereon.

References Cited UNITED STATES PATENTS 2,279,577 4/1942 Martin 4-131 2,321,125 6/ 1943 Brady.

2,847,951 8/1958 Triggs llO-8 2,882,534 4/1959 Jauch et al. -9 X 3,051,100 8/ 1962 Singleton 110-8 3,059,597 10/1962 Wood 110-9 3,092,049 6/1963 Wood 110-9 3,103,017 9/1963 La Mere 110-9 X FOREIGN PATENTS 456,067 2/ 1928 Germany.

FREDERICK L. MATTESON, 111., Primary Examiner.

H. B. RAMEY, Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,323,473 June 6, 1967 Donald P. Frankel It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:

In the heading to the printed specification, line 5, "Wisconsin" should read Delaware Signed and sealed this 23rd day of September 1969.

(SEAL) Attest:

WILLIAM E. SCHUYLER, IR.

Edward M. Fletcher, Jr.

Commissioner of Patents Attesting Officer 

15. IN AN INCINERATING DEVICE, A BOWL HAVING AN INLET AND AN OUTLET, COVER MEANS FOR SELECTIVELY OPENING AND CLOSING SAID INLET, AND A WASTE RECEIVING SURFACE IN SAID BOWL: BURNER MEANS DISPOSED TO DIRECT A FLAME ON SAID RECEIVING SURFACE FOR BURNING WASTE, FIRST ROTARY BLOWER MEANS FOR DELIVERING A FUEL-AIR MIXTURE TO SAID BURNER MEANS, SECOND ROTARY BLOWER MEANS MOUNTED AT SAID OUTLET FOR EXHAUSTING COMBUSTION GASES FROM THE BOWL THROUGH SAID OUTLET, A COMMON SHAFT MOUNTING SAID FIRST AND SECOND ROTARY BLOWER MEANS ON A COMMON AXIS OF ROTATION, AND MOTOR MEANS FOR DRIVING SAID SHAFT, AND THEREBY BOTH OF SAID BLOWER MEANS, AT RELATIVELY HIGH SPEEDS. 